# Relationship history for MSHA mine 3503324

Current hierarchy: **Michael  Lee → Bayview Asphalt, Inc. → SQUARE CREEK QUARRY**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Bayview Transit Mix Inc → SQUARE CREEK QUARRY; 1988-12-01 to 1999-06-01; source msha-controller-operator-history
- **controller_controls_mine:** James P  Perrigo → SQUARE CREEK QUARRY; 1988-12-01 to 1999-06-01; source msha-controller-operator-history
- **controller_controls_operator:** James P  Perrigo → Bayview Transit Mix Inc; 1988-12-01 to 1999-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Bayview Asphalt, Inc. → SQUARE CREEK QUARRY; 1999-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Lee et al → SQUARE CREEK QUARRY; 1999-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Lee et al → Bayview Asphalt, Inc.; 1999-06-02 to current/open; source msha-controller-operator-history